<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>p5_浮动布局</title>
    <style>
        .fu{
           background-color: silver;
            overflow: hidden;
        }
       .fu>div{
           width: 100px;
           height: 100px;
           border: 3px solid #000;
       }
       .z1{
           background-color: red;
           float:left;
       }
       .z2{
           background-color: blue;
           float:left;
       }
       .z3{
           background-color: lime;
           float:left;
       }


    </style>
</head>
<body>
<div class="fu">
  <div class="z1"></div>
  <div class="z2"></div>
  <div class="z3"></div>
</div>
</body>
</html>